Dr Harry Clinic
Close macro of a natural hair parting showing scalp skin and individual strands, warm neutral editorial lighting
Polyphil Hair, the Parting

Widening at the parting is often the first thing people notice.

The scalp is treated directly rather than the hair shaft.

Assessed and mapped at consultation before any course begins.

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Collagen stimulators

Polyphil Hair: Polynucleotides for the Scalp

Treat the scalp the hair grows from with PolyPhil Hair, a polynucleotide treatment now available at both of our London clinics.

At a glance

What it does

Polynucleotides delivered into the scalp itself, so the treatment works on the skin the follicle sits in.

Also

A structured course of eight sessions: four sessions one to two weeks apart, then four more three to four weeks apart.

And

Considered for thinning and increased shedding, including shedding noticed after starting weight loss injections.

Timing

Delivered by Dr Harry James, GMC registered and an ACE Group World faculty member, at Chiswick and Covent Garden.

Guide price

£350 course of 3 £900, course of 4 £1,150

Practitioner

Dr Harry James
MBChB PGDip (CAIT), GMC 7528423

Clinics

Chiswick and Covent Garden

Consultation

£75, book online

On this plate

  • Polyphil Hair, the Parting
    Widening at the parting is often the first thing people notice.. The scalp is treated directly rather than the hair shaft.. Assessed and mapped at consultation before any course begins.
  • Polyphil Hair, the Crown
    The crown is treated across the area, not at a single point.. Micro injections are spaced across the scalp in one session.. Sessions take roughly the same time as a skin booster appointment.
  • Polyphil Hair, the Hairline
    The front hairline is treated where it is appropriate to do so.. Course design depends on what Dr Harry finds at assessment.. Reviewed as the course progresses rather than judged in one visit.

Understanding PolyPhil Hair

PolyPhil Hair is a polynucleotide treatment for the scalp. Polynucleotides are highly purified DNA fragments, commonly derived from salmon DNA, and they are already used across our clinic to support skin quality on the face, under the eyes, the neck and the hands. PolyPhil Hair applies the same regenerative approach to the scalp.

The distinction that matters is what is being treated. This is not a product applied to the hair shaft, and it is not a transplant. It is a course of micro injections into the scalp, placed to support the skin in which the follicle sits, including its collagen framework and its blood supply.

Because it works with the body’s own repair processes rather than adding volume, PolyPhil Hair is a course rather than a single appointment, and it is assessed over months rather than days. Dr Harry James will tell you at consultation whether he believes it is the right option for the pattern of thinning you have, and will say so plainly if it is not.

PolyPhil Hair is available at our Chiswick clinic and our Covent Garden clinic.

PolyPhil Hair Treatment Explained

01What PolyPhil Hair Is, and What It Is Not

PolyPhil Hair is a course of polynucleotide micro injections into the scalp. Polynucleotides are purified DNA fragments that stimulate fibroblast activity, support collagen production and encourage the formation of new blood vessels, which is the same mechanism behind our polynucleotide skin treatments.

It is worth being clear about what it is not:

  • It is not a hair transplant and it does not move or add follicles.
  • It is not a topical product you apply at home, although your aftercare may include one.
  • It is not a single session treatment, and a single session is not how it is designed to be judged.
  • It is not a replacement for a medical diagnosis if there is an underlying cause for your hair loss.

02Why the Scalp Is Treated Rather Than the Hair

Hair grows out of skin. The follicle sits within the dermis and depends on the condition of that tissue and on the blood supply reaching it. When the scalp environment deteriorates, hair quality tends to follow.

Treating the scalp directly is therefore the point of PolyPhil Hair. The injections are placed across the area of concern so the product is distributed through the tissue rather than concentrated in one spot, using the same micro injection principles we apply to delicate areas of the face.

03The Eight Session Protocol In Full

PolyPhil Hair is delivered as eight sessions in two phases:

  • Phase one, four sessions. Spaced one to two weeks apart.
  • Phase two, four sessions. Spaced three to four weeks apart.

The closer spacing at the start builds the treatment up, and the wider spacing that follows maintains it while the scalp responds. Eight sessions is the full protocol. A course of four is available where Dr Harry considers it appropriate, and he will explain at consultation which he recommends for you and why.

Regenerative treatments are assessed over a course rather than after a single visit, so progress is reviewed as you go.

04Who PolyPhil Hair Is Considered For

PolyPhil Hair is considered for men and women who have noticed:

  • Gradual thinning, particularly at the parting or the crown.
  • An increase in shedding compared with what is normal for them.
  • Hair that feels finer or less dense than it used to.
  • Increased shedding after starting a weight loss injection, which is a common reason people ask about this treatment.

Hair loss has many causes, and several of them are medical rather than aesthetic. Thyroid disease, iron deficiency, recent illness, rapid weight loss, medication and inherited pattern hair loss all present differently and are managed differently. Part of the consultation is establishing whether something else needs investigating first, and Dr Harry will tell you if he thinks you should see your GP before starting a course.

05Shedding After Weight Loss Injections

People starting weight loss injections often report hair shedding some months in. It is one of the most common reasons patients now ask us about scalp treatment.

What we will discuss at your consultation is the timing of your shedding against the timing of your weight loss, what your nutrition looks like now, and whether the pattern you have is one that PolyPhil Hair is a sensible option for. That conversation matters more than the treatment itself, because shedding related to rapid weight change behaves differently from inherited pattern hair loss, and for some people the right answer will be to address the cause first.

06What a Session Involves, and Downtime

A session is an appointment at either clinic in which polynucleotides are placed across the scalp through a series of micro injections. Sessions are comparable in length to a skin booster appointment.

You should expect the scalp to feel tender for a short period afterwards, and small injection points may be visible for a time. As with any injectable treatment, bruising, swelling, tenderness and, rarely, infection are possible. Dr Harry will take you through the risks that apply to you at consultation, and you will be given aftercare instructions for washing, styling and heat.

Every treatment at Dr Harry Clinic includes a complimentary review appointment within three weeks.

07PolyPhil Hair Prices

PolyPhil Hair is priced as follows at both clinics:

  • Single session, £350.
  • Course of four sessions, £1,150.
  • Course of eight sessions, £2,200. This is the full protocol.

The course of four and the course of eight each include a complimentary Obagi Nu-Cil Biostim scalp serum, worth £135.

A consultation is £75 and is redeemable against the cost of your treatment if you go ahead. It is refundable if you decide not to proceed, and non refundable only if you cancel within 24 hours or do not attend. Full pricing for the clinic is on our prices page.

08How PolyPhil Hair Sits Alongside Other Treatments

PolyPhil Hair treats the scalp, so it does not compete with the facial treatments many of our patients already have. The complimentary Obagi Nu-Cil Biostim scalp serum included with the courses is intended to support the treatment between sessions rather than to replace it.

If you are already having polynucleotides, Profhilo or other collagen stimulating treatments with us, tell us at consultation so your appointments can be planned together rather than scheduled against each other.

Dr Harry James, MBChB PGDip (CAIT), at Dr Harry Clinic
Dr Harry JamesMBChB PGDip (CAIT) · Aesthetic Doctor & Clinical Director

Meet Dr Harry James

Certified trainer. Award-nominated aesthetic medicine expert.

Dr Harry James brings a wealth of experience and clinical precision to our London clinics. As a certified trainer in aesthetic medicine and a finalist in multiple national aesthetic award ceremonies, Dr Harry is recognised for his advanced techniques, patient-focused results, and commitment to setting high standards in non-surgical aesthetics.

His expertise extends beyond delivering treatment, he actively trains other practitioners and remains at the forefront of the field through continuous education and professional development.

  • Certified Aesthetic Medicine Trainer
  • Finalist in Multiple Aesthetic Award Ceremonies
  • Advanced Facial Injection Techniques Specialist
  • Medically Qualified with Extensive Postgraduate Training
  • Committed to Excellence in Patient Care & Safety
  • GMC registered, 7528423

Common questions

PolyPhil Hair FAQs

01How many PolyPhil Hair sessions will I need?

The full protocol is eight sessions: four sessions one to two weeks apart, then four more three to four weeks apart. A course of four is available where Dr Harry considers it appropriate. He will recommend which is right for you at consultation and explain his reasoning.

02Is PolyPhil Hair suitable if my hair started shedding after a weight loss injection?

It is one of the most common reasons patients ask about this treatment, and it is something we will discuss in detail. Shedding that follows rapid weight loss behaves differently from inherited pattern hair loss, so the consultation covers the timing of your shedding, your nutrition and whether anything else should be looked at first. Dr Harry will say plainly if he thinks the cause should be addressed before a course is started.

03Does PolyPhil Hair hurt, and is there any downtime?

Treatment is delivered as micro injections into the scalp and most people find it manageable. The scalp is usually tender for a short period afterwards, and small injection points may be visible for a time. Bruising, swelling, tenderness and, rarely, infection are possible with any injectable treatment. You will be given aftercare instructions covering washing, styling and heat.

04What does PolyPhil Hair cost?

A single session is £350, a course of four is £1,150, and the full course of eight is £2,200. The four and eight session courses each include a complimentary Obagi Nu-Cil Biostim scalp serum worth £135. Consultation is £75 and is redeemable against your treatment.

Our locations

Two premium clinics across London

West London

Dr Harry Clinic, Chiswick

The consultation room at Dr Harry Clinic
Dr Harry Clinic, Aesthetic Clinic in Chiswick300 Chiswick High Road, Chiswick, London W4 1NP
Telephone020 3633 8687
HoursMonday to Sunday, 10am to 7pm, by appointment only
Getting hereChiswick Park station (District Line), 3 min walk. Bus routes 27, 237, 267, E3. Free parking on surrounding streets.

★★★★★ Rated 5.0 on Google

Central London

Dr Harry Clinic, Covent Garden

Dr Harry James in the consultation room
Dr Harry Clinic, Aesthetic Clinic in Covent GardenJubilee Hall, 30 The Piazza, Covent Garden, London WC2E 8BE
Telephone020 3633 8687
HoursMonday to Sunday, 10am to 7pm, by appointment only
Getting hereNearest: Covent Garden (Piccadilly Line).

★★★★★ Rated 5.0 on Google

All treatments are available at both our Chiswick clinic and Covent Garden clinic.

Dr Harry James in the consultation room at Dr Harry Clinic

Not sure which treatment is right for you?

Every journey begins with a consultation.

Schedule a consultation with Dr Harry James to discuss your goals and discover the right treatment plan. Dr Harry will assess your concerns, explain suitable treatment options, and create a personalised plan designed to achieve your desired results.